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YOUR RESEARCHRotors / pads question
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labor in swapping pads
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Performed · outcome unconfirmed · Original poster
Was hoping to pick up someone�s old stock on the forums (someone who swapped cars etc) but not much luck so far.
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Performed · outcome unconfirmed · Original poster
Ran Carbotech XP10s on the last car (that I did track).
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Performed · outcome unconfirmed
I never changed pads for DEs cause I am too lazy for that, just ran good street pads and was careful not to glaze them.
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Hi all,
Quick question. Someone I know is selling a set of brake pads and rotors, was wondering if I should get these or not - I'm coming up due.
1) The pads are Porterfield APs. The car spends most time on the road - will these be OK for the road? (i.e., not looking for a particularly track-focussed set, don't want insane noise a la Carbotech and zero braking performance while cold, etc)
2) Rear rotors are OEM, turned to 22.1 / 22.2 mm. This seems to be very close to the minimum recommended thickness. Should I pass on the rotors and get a brand new set instead?
Thanks!
As a general rule, brakes are not something you want to pinch pennies on. You dont have to drop a fortune on super fancy pads and rotors, but dont throw on old stuff near the end of their life anyway. I believe when I looked last stock parts were 450-500 bones front and about the same for the back. They are also super easy to do yourself.
I put the Porterfield street pads (R4-S) on my 968 last year, the R4 is too much a track pad for daily use. Absolutely no squeal, minimal dust and great stopping power. use the anti-squeal backing disks (can order from Porsche) and you'll have no noise.
+1 on not reusing used pads, rotors. Cost for new is reasonable and you're not back in changing stuff for a long time.
Right, I figured - thanks for the replies. Ok, so to be much more specific:
- the pads were AP738 and AP776, with brand new OEM front rotors
- I was just going to get a set of Pagid rear rotors (I'm a believer that proper pads matter far more than fancy rotors as long as the rotors don't overdo the drilling / slotting / etc).
Am I super misguided here and am I walking into a screaming yelling whining track machine that spends more life on the streets of Tokyo than on Fuji Raceway? Should I go back to the drawing board?
Why don't you contact Porterfield and ask about this specific combination and see what they tell you? Those are racing pads, not street pads. Different heating characteristics, noise and dust characteristics.
The front rotors are new OEM? Then they should be fine, but you'll want to match with OEM on the rear. I'm not a brake expert but it seems to me that different rotors could have different characteristics and you'd be better off matching the fronts and rears. Why introduce a variable on a street car to maybe save a few dollars?.
I'm leaning toward the drawing board approach. You really want to be able to stop your car safely.
Not an issue to get OEMs (agree on the mixing being a bit iffy), but guess I wanted to also be sure the Porterfields aren't too noisy. I'll reach out to them and ask, it's a good idea I think.
It's not just noise. Track pads take longer to heat up to optimal temps than street pads. Great for track where you really use the brakes a lot, not good for the street where you really don't use the brakes hard. As a result track pads don't stop cars on the street. Be sure to discuss your application with them. Proper brake pads are cheaper than bodynwork.
Yup. Am aware of that. Ran Carbotech XP10s on the last car (that I did track). Was usually too lazy to swap pads so first few minutes in winter was always hilarious. Good thing I lived in the woods where there was nothing to brake for.
I'm in the opposite camp. After switching back and forth between track pads and street pads every track day for awhile, I realized that used vs new pads is pretty irrelevant. I've latched on to every used track pad deal I've found since then and had great results.
I bought used pads for a couple of track events and had no issues. I then put my old used pads back on. Again, no issues.
The problem is the labor in swapping pads. I know folks say that it�s easy to do, and I agree. So are oil changes. But it still takes time. I guess it depends on how often folks go through pads and how much life is left on the used pads folks are buying.
If you are doing a DE type event good street pads would work just fine, not out there hard on the brakes that much. Serious racing would be a different matter. I never changed pads for DEs cause I am too lazy for that, just ran good street pads and was careful not to glaze them. Left track pads on my serious car and just enjoyed listening to them squeal on the street.
Got a reply from Porterfield. R-4s are a full race compound, so will be dusty and squealey on the road. Guess it's back to the classifieds, doh!
Out of curiosity, once the brake pad light is on, how much time before I start scraping the pad backing? Or am I on borrowed time already?
R4-S are street pads with low dust and low noise and great performance. See their web site. Maybe their web site is wrong? That's exactly what I have experienced.
https://www.porterfield-brakes.com/m...akes/R4-S.html
If the pad wear light is on, you are pretty much there. But, if you are replacing the rotors as well, you can afford to score them before replacing everything. But braking will be diminished.
Apologies, was writing before fully awake and put too many �S�s into my post. Edited to fix.
Yeah rotors will go too so I don�t mind scoring them. Was hoping to pick up someone�s old stock on the forums (someone who swapped cars etc) but not much luck so far. Will keep an eye out for another month or two (don�t drive _that_ much) and then just go for Suncoast I guess.
No problem.
Be sure to change the pad wear indicators at the same time you do the pads and rotors.
Shop around for pads and rotors, you can find good prices at dealers like Suncoast or Sunset. I get good prices from Scottsdale (PCA member discount). Pelican and others.
Zimmerman is a good rotor, I like my Stoptechs. My mechanic likes Textar.
Thanks. I was hoping to buy Pagids as they're really cheap on Pelican (and I've always believed pads are far more important than rotors, which are usually just steel discs that "work"), but I've been seeing some really awful forum feedback on Pagids. I guess, also, since I'd be getting drilled or slotted or something rotors, it's no longer just a question of "it's a rotating piece of metal" but I actually need some qualify behind it. (I'm not worried about warping, as tracking isn't in the cards for another year or two, so probably the life of these rotors).
If you aren't tracking then Meyle rotors on eBay are the ticket. You can pick them up for around $100 a pair, right JayG?
Also, if you aren't tracking, Pagids are pretty much a waste of money. Throw a WTB ad on the classified and you will get plenty of responses for used pads. I have lots of them but they are all either stock or track pads. Nothing in between.
As for pad wear, I'll usually take them down to 1mm of compound left before changing them. Trackpads especially will start cracking at that point and you know they are done.
"Quote:
Originally Posted by Slakker
If you aren't tracking then Meyle rotors on eBay are the ticket. You can pick them up for around $100 a pair, right JayG?
Also, if you aren't tracking, Pagids are pretty much a waste of money. Throw a WTB ad on the classified and you will get plenty of responses for used pads. I have lots of them but they are all either stock or track pads. Nothing in between.
As for pad wear, I'll usually take them down to 1mm of compound left before changing them. Trackpads especially will start cracking at that point and you know they are done."
I'm in the process of doing my brakes now. I got this kit from "New parts" via Ebay
https://www.ebay.com/itm/Porsche-911...4383.l4275.c10
They are Meyle rotors (cross drilled). I can't comment on the pads (ceramic hybrid low dust) yet as I haven't driven with them. I'll update when I get 'er back on the road. I've also got to do the e-brake cables and shoes which I'm still waiting on from Auto Atlanta so it may be awhile... Street use only for me...
I just installed Pagid rotors in all 4 corners. Got them super cheap from rock auto. Ya I read some mixed reviews on the interwebs but figured give them a shot and if they don't work out get some Zimmerman or Brembos.
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